摘要
文章描述了桂西北乐业、天峨等地区发现于上二叠统顶部、下三叠统顶部的 2个古岩溶不整合面 ,及其暴露、沉积间断特征 ,分析了它们的形成时代。通过这 2个I型层序界面的确认 ,讨论了其与地层划分对比、沉积环境及盆地分析、断裂的发育及与微粒型金矿的关系与意义。
Two paleokart unconformity surfaces are discovered in the Tian'e-Le'ye area, etc, Northwestern Guangxi, which an unconformity is on the top of Late Permian, and other is on the top of Early Triassic. This paper introduce their marks of subaerial exposures and the features of sedimentary break and formation ages. Through the two I-type sequences boundaries are affirmed, the authors discuss the relation and significance between unconformity and stratigraphic division and correlation, and an analysis of sedimentary environment and basins, and the formation mechanism fault and microfine grained gold type deposits in the study area.
出处
《广西地质》
2002年第4期5-10,共6页
Guangxi Geology
关键词
古岩溶
不整合
超覆
上二叠统
下三叠统
中三叠统
桂西北
paleokart
unconformity
overlap
Late Permian
Early Triassic
Mid-Triassic
Northwestern Guangxi
